Investigators say Cassidy lifted the moving infant from the toilet, felt for a pulse, found one, then placed her hands around the infant's neck and squeezed until he wasn't moving or breathing any longer. She took the infant's pulse again and found none.

Detectives add that Cassidy cleaned up the bathroom, bathed herself and the dead infant before placing him in a shoebox along with soiled towels and clothing.

Authorities say the girl's mother did take her to Lakeland Regional Medical Center that day, after seeing a mess in the bathroom, and the teen claimed she miscarried.